The first thing that you should consider while buying a car washer is Reliability and After sales (spare parts) as these things are not bought as disposable items. They should serve for years.
Sadly these chinese washers in the market are the least reliable, have short lifespan, and almost non existant after sales service.
Do not buy this Black n Decker washer as its a fake chinese copy and its not the real Black n decker. Check nd compare the labels.
The pressure ratings are fake on all chinese washers. Hyundai 105 bar washer is In reality around 90 bars when you actually use it). Its chinese and not korean original hyundai.
Compared it myself with a karcher 110 bar. The pressure was 70% of what Karcher was giving and Hyundai was not cleaning the dirt with ease.
Go for Karcher k2 Kompact. Its a little expensive ( a difference of 3-4 thousand rupees) but will serve you for a long time. I bought it and cleaning cars now is fun. It doesnt come with a foam lance but its not important as it has shampoo suction mechanism and more or less serves the purpose.
The most important thing Karcher Kompact comes with and most Chinese washers lack is the Dirt Blaster. That is all you would be needing to clean wheel wells and undercarriages with ease.
Dont fall for a mere foam lance. The foam lance that cones with chinese washers is useless anyways.Build your arsenal gradually if you cant spend at once.
But do not compromise on the machine.
Karcher cones with a one year warranty, you can find parts and after sales service is there.
accessories can be bought later as well.
